As any coffee fan knows, sometimes you’re in the mood for a quick cup of fresh brewed java to carry with you out the door, and other times you want the comfort of a full pot of dark roast to get you ...

I test a lot of coffee machines. Like, a lot of them. The Ratio Four is the small-batch brewer I use to try new kinds of coffee. Coffee is the original office biohack and the nation’s most popular ...